Safety device for forging-manipulators.



D. KENDALL. SAETY DEVICE FOR FORGING MANIPULATORS. APPLICATION FILED luLY s. lsu.

1,281,393; Patented oet. 15, 191g 2 SHEETS-SHEEI l.

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SAFETY DEVICE FOR FoRGlNG MANIPULATORS.

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DAVID KENDALL, OF ALLIANCE, OHIO, ASSIGNOR TO THE ALLIANCE MACHINE COMPANY, OF ALLIANCE, OHIO, A CORPORATION OF OHIO.

SAFETY DEVICE FOR FORGINGr-IVIANIPULATORS.

1,281,393. Speciation f Letters Patent Patented Oct. 15, 1918. Application mea July 5, 1917. seriai No. 178,636.

To aZZfwLo/m t may concern: and 12. On the frame of the trolley is Be it known that I, DAVID KENDALL, a mounted a shaft 13 carrying the two grooved 55 citizen of the United States, residing at wheels 14 and 15. On the trolley is also a Alliance, Stark county, Ohio, have invented drum, connected by gears 16 with a motor a new and useful Safety Device for Forg- 17. This drum has the winding portions 18 ing-Manipulators, of which the following and 19 which are preferably helically s a full, clear, and exact description, refgrooved, the grooves of the two portions be- 60 erence being had to the accompanying drawing of opposite hand. A rope 20 is made ings, forming part of this specification, in fast at one end to the portion 18 of the drum,

which extends thence downwardly and underneath Figure 1 is an end elevation of mechanism the wheel 9; thence upwardly and over the embodying my invention, and wheel 14, thence downwardly and under the 65 Figs. 2 and 3 are, respectively, end and wheel 10, thence upwardly and over a wheel front elevations, largely conventional, of a 21 mounted on the trolley, its dead end beportion of the mechanism. ing connected to a counterweight 22. A My invention has relation to forging second rope 23 is connected at one end to the manipulators; and is designed to provide a portion 19 of the winding drum, extending 70 safety device for use in connection with downwardly therefrom and under the wheel such manipulators by means of which un- 12, thence upwardly and over the wheel 15, due strains upon the structure are prevented thence downwardly and under the wheel 11, when, for any reason, the forging is not thence upwardly and over a grooved wheel level on the anvil when the press or ham- 24 on the trolley, its end also being con- 75 mer comes down. The invention is espenected to the counterweight 22. i cially applicable to manipulators of the The counterweight 22 normally rests on a 25 crane type, but may be applied to other suitably xed support 'or shelf 25 carried by types. the trolley, and is inactive in the ordinary The nature of my invention will be best operation of raising and lowering the ma- 80 understood by reference to the accompanynipulator by the operation of the winding ing drawings in which I have shown the drum, its mass being properly proportioned preferred embodiment thereof, and which with respect to the weight of the manipulawill now be described, it being premised, tor and of the ingot or workpiece carrie however, that various changes can be made thereby. For instance, if the total weight 85 in the details of construction and operation of the manipulator and its load suspended of the several parts without departing from from the trolley is fourteen tons, the counthe spirit and scope of my invention as deterweight will weigh approximately four fined in the appended claims. tons. Thus, with the two ropes 20 and 23,

In these drawings the numeral 2 desigeach having four turns, it will require ap- 90 nates a crane bridge which is mounted for proximately an action of sixteen tons before travel on the elevated track rails 3 in the the counterweight will lift. 1f, through any usual manner. 4 is a trolley which is mountfault of the Operator in not having the forged for transverse travel on the bride 2, 5 is ing level on the anvil block of the hammer the post or column of a manipulator, and 6 or press when the hammer or press comes 95 the manipulating arm. As thus generally down, instead of this throwing a very great described, the mechanism is old and well strain upon the crane, the counterweight known in the art, the manipulator arm 6 automatically comes into action and lifts. being arranged in a well known manner to This allows the bottom mechanism with its grip and rotate an ingot, and carry it to a forging to go down as far as the stroke of 100 press or hammer 7. either the press or the stroke of the counter- In accordance with my invention the weight. frame or column 5 is suspended from the The advantages of my invention will be v crane trolley in the following manner: It apparent since it provides a safety device is provided with 'a shaft 8 on which are which lwill automatically come into opera- 105 matassa t e saliese s, 1G, it tien te prevent injury te the erase ander conditions which would otherwise throw severe and oftentimes destructive strains on the crane.v

I claim l. rIhe combination with a forging manipulator, of a safety device therefor comprising a winding drum, a flexible suspension member connected to the drum land to the frame of the manipulator, and a normally inactive counterweight tofwhich`the dead end of the said member is connected, substantially as describedf l 3. In forging manipulator of the crane type, the combination of a crane trolley having a winding drum thereon, flexible suspension members connected to said drum to wind thereon, a manipulator frame or column hav-ing sheaves or pulleys engaged by said suspension'members, and a counterweight to which the ends of said members are connected, substantially as described.

3.111 a forging manipulator' ofthe crane type, the combination of a crane trolley hav- `ing a winding drum thereon, flexible suspension members connected to said drum to wind thereon, a manipulator frame or column having sheaves or pulleys engaged by said suspension weight to which the ends of said members are connected, together with means for normally supporting said counterweight, substantially as described.

l. In a forging manipulator of the crane type, the combination of a crane trolley. hav- Copies of this patent may be obtained for members, and a countering a winding drum thereon, flexible susmanipulator, and a normally inactive safety supporting device for the manipulator which i is nly affected by ,the deivnward movement of the manipulator lunder abnormal'forging conditions and is not a'ected by the upward movement of the manipulator, substantially as described.

6. The combination with a forging manipulator, of a safety device connected thereto and comprising a counterbalance which overbalances the weight of the manipulator under normal kforging conditions, but permitsit to automatically move downwardly under abnormal forging conditions together withmeansfor preventing movement of the counterbalance when'the manipulator is moved upwardly; substantially as described.

In testimony whereof, I have hereunto set my hand.

DAVID KENDALL.

five cents each, by addressing the Cemmisivner f Patents, Washington, D, C. 

